Just a quick update to anyone still keeping track of this work. The host-meta spec has been approved as RFC and will move to the RFC editor shortly. The spec is final and will be published as an IETF Proposed Standard.
If you haven't been following it for the past year, the two major changes are:
* Simplification of the HTTP vs HTTPS prose, moving the decision to the application using it. IOW, if you are using it for security or identity services, you should require HTTPS or some form of signatures.
* JSON-based format (JRD) with full support for all XRD features and host-meta priority-based processing.
I would highly recommend that if you are deploying any new host-meta facilities, that you support the host-meta.json resource and look for it first when parsing.
EHL